Sectional water-tube boiler



(No Model.) 2 Sheets-Sheet 1'. E. J. MOORE.

SEOTIONAL WATER TUBE BOILER. No. 371,616. Patented Oct. 18, 1887.

\/\/ITNEEEEE INVENT EH- 2 Sheets-Sheet 2.

(No Model.)

B. J. MOORE.

SEOTIONAL WATER TUBE BOILER.

Patented Oct. 18, 1887.

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accompanying drawings, forming a part here- UNITED STATES.

PATENT OFFICE.

EDW'ARD J. MOORE, OF PHILADELPHIA, PENNSYLVANIA.

SECTIONAL WATER-TUBE BOILER.

SPECIFICATION forming part of Letters Patent No. 371,616, dated October 18, 1887.

Application filed January 10, 1887.

To all whom, it may concern.-

Be it known that I, EDWARD J. MOORE, of the city of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain Improvements in Sectional \Vater-Tube Boilers, of which the following is a specification.

This invention relates to a peculiar construction of a headerthat is to say, the same is formed of a series of polygonal tubes in sections, and the said sections are provided with a front covering-plate. These covering-plates are each provided with circular openings, one of which is opposite each tube, and these open ings are each fitted with an internal conicalfaced stopper having a central bolt, a cap on the outside through which the said central bolt passes, and asocket-nut. These sectional polygonal headers are provided with interior braces to prevent their distortion from internal pressure, the said braces consisting either of socket bolts or ribs, according to the construction of the said tubes and the material from which they are formed, as will hereinafter fully appear. The polygonal headers are connected in a vertical direction by means of nipples which are expanded therein, and when the said headers are formed of wrought-iron or steel they are separated transversely and independently of the front plates by means of bands sprung over them, as will hereinafter fully appear.

In the further description of the said invention which follows reference is made to the of, and in whieh- Figure I is a sectional side elevation of the improved water-tube boiler. Figs. II to V are details of the boiler on an enlarged scale, and illustrating slight modifications in the construction of the same, as required according whether the headers are formed of cast or wrought material.

In the said drawings, A represents the horizontal sections of headers, which are united in a vertical direction by means of nipples a, as shown. In Figs. II and III the sections are shown as formed of wrought-iron or steel, and have rounded ends. In Figs. IV and V they are made of cast-iron, with preferably rectangular ends. They are also constructed 1 Serial No. 223,885. (No model.)

in two different lengths, in order to break joints and stagger the tubes-that is to say, a header having, say, two water-tubes is placed centrally over one having three tubes.

B B are the plates which form the fronts of the headers. In Figs. II and III these plates are of rectangular form and extend slightly over or outside of the headers,which are separated in order to form a continuous outer surface. In Figs. IV and V the said plates are smaller than the headersections, and the said sections are of rectangular shape, which together form the front surface of the boiler instead of the plates, asinFigs. II and III. The said front plates are held to the headers by means of bolts 0, and it will be seen that where there are two tubes a single holding-bolt is employed, and where there are three tubes two holding-bolts are used, or, in other words, there is a bolt between each pair of watertubes. These bolts are of such size as to stand any pressure to which the boiler is subjected; but the plates are intended to spring slightly from their seats ata pressure above that which the boiler is intended to carry, but far below the bursting-point. The plates therefore answcr the purpose of safety-valves to relieve the boiler from dangerous pressure, and for this reason they are termed relievingplates. V The holding-bolts C are coupled at their in ner ends to lugs b by means of transverse bolts 0, as shown particularly in Fig. II.

The headers are braced internally, when of wrought-iron or steel, by means of staybolts d, which may be screwed into the walls of the header or riveted thereto and provided with thimbles, as preferred; but if the headers are formed of cast-iron, as shown in Figs. IV and V, the braces or stays will consist of ribs which are cast in one piece therewith.

In cast-iron headers containing three tubes the ribs are straight, While in those having but two tubes the ribs are curved or flared, in order that they may not interfere with the connecting-nipples, (see Fig. V;) but in both constructions the transverse bolt 0 passes through the ribs and has a head and nut to keep it in place.

As before stated, the relieving-plates have holes directly opposite the tubes for cleaning purposes, and each hole is provided with a conical-faced stopper, D, which rests against a conical face at the inner side of the said plate.

The exterior caps are denoted by e, and the bolts which hold the said caps in place are repand that the furnace and the settings of the boiler are of the ordinary description.

I Iare bands sprung over the wrought-iron or steel headers to separate them transversely to the proper distance independently of the front relieving-plates and to strengthen them.

I claim as my invention v 1. In a sectional water -tube boiler, the header thereof formed of horizontally-placed polygonal tubes in sections or lengths, each section or length having a relieving-plate provided with a hole over or opposite each watertube, which hole is fitted with a conicalfaced internal stopper and a covering-plate, which together are held to the relieving-plate by means of a central bolt, substantiallyas and for the purpose specified.

2. In a sectional watertube boiler, the header thereof formed of a series of horizontallyplaced polygonal tubes in sections or lengths, each section or length having a relieving-plate held to the outer face thereof by means of one or more bolts connected to the rear of the said tube, and provided with a hole which is directly over or opposite each water-tube, in which hole is held, by means of abolt and nut, a conical-faced stopper situated on the inside of the said relieving-plate, sub stantially as and for the purpose specified.

3. In a sectional water tube boiler, the header thereof formed of a series of polygonal tubes in sections or lengths, each section or length having a relieving-plate secured by means of one or more holdingbolts, which are .attached'to the rear of the tube by means of a transverse boltiwhich passes through the end of the said holding-bolt and a lug, substantially as and for the purpose specified.

4. In asectional water-tube boiler,theheader thereof formed of a series of polygonal tubes in sections or lengths, the said sections or lengths having rounded ends and provided with rectangular relieving-plates secured to the outer faces thereof by means of one or more bolts, substantially .as and for the purpose specified. i

5. In a sectional water tube boiler, the header thereof formed of a series of polygonal tubes in sections, the said sections having rounded ends, over which are sprung semicircular bands, and having on their outer faces rectangular relieving-plates, which are held thereto by means of bolts, substantially as and for the purpose specified.

6. In a sectional water -tube boiler, the header thereof formed of a series of wroughtiron or steel polygonal tubes in sections or lengths, having rounded ends and coveringplates, the said sections being connected vertically by means of nipples, and having interior braces to prevent distortion from internal pressure, substantially asand for the purpose specified.

7. In a sectional water-tube boiler, the

header thereof formed of a series of wroughtiron or steel polygonal tubes in sections or lengths, having rounded ends and provided with internal stay-bolts, arranged as shown, to prevent distortion from internal pressure, substantially as and for the purpose specified.

8. In a sectional water-tube boiler, the header thereof formed of a series of polygonal tubes in sections or lengths, each section or length having a relieving-plate secured by means of one or more holding-bolts,which are passed through the relieving-plate and attached to the rear of the tube and provided with a nipple, whereby it is adapted for connection with another similar and adjoining seetion,substantially as and for the purpose specified.

EDWARD J. MOORE.

\Vitnesses:

WM. T. HOWARD, DANL. FISHER. 

